<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="bootstrap-3.4.1-dist/js/jquery-3.6.0.min.js"></script>
  <script src="bootstrap-3.4.1-dist/js/bootstrap.min.js"></script>
  <link rel="stylesheet" href="./bootstrap-3.4.1-dist/css/bootstrap.min.css">
  <title>常用样式之按钮</title>
  <style>
    table.mytable tbody tr:hover {
      background: #933;
      color:#fff;
    }
    #content {
      border:1px solid red;
    }
    /* #left,#center,#right {
      float:left;
    } */
  </style>
</head>
<body>
  <div class="container">
  <p>
    <a class="btn btn-danger" href="#" role="button">Link</a>
    <!-- Indicates a successful or positive action -->
    <button type="button" class="btn btn-success">（成功）Success</button>
  </p>
  <p>
    <button type="button" class="btn btn-primary btn-lg">（大按钮）Large button</button>
    <button type="button" class="btn btn-lg btn-primary" disabled="disabled">Primary button</button>
  </p>
  <p>
    <div class="row">
      <div class="col-md-3">
        <img src="01.jpg" class="img-responsive" alt="">
      </div>
    </div>
  </p>
  <p>
    <img src="01.jpg" width="300" height="300" class="img-circle" alt="">
    <img src="01.jpg" width="300" height="300" class="img-thumbnail" alt="">
  </p>
  <p>
    <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>
  </p>
  <div id="content">
    <div id="left" class="pull-left hidden-sm hidden-xs">
      左边信息
    </div>
    <div id="center" class="pull-left">
      中间信息
    </div>
    <div id="right" class="pull-left">
      右边信息
    </div>
    <div class="clearfix"></div>
  </div>
  </div>
  
</body>
</html>